The final numbers for the ETF industry are in for 2009, and the results are truly impressive. Total ETF assets grew nearly 50% on the year, aided by a strong recovery in financial markets but also by strong cash inflows across the board. ETFs have clearly been established as much more than a passing fad, [...] Related Stories: August ETF Stats: Big Gains For Small Players September ETF Data: Summer Rally Continues November ETF Numbers: Let The Good Times Roll